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    <title>Document</title>
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<body>
    <script>
        // cb("参数")
        // localhost:8989?cb=fn
        // funciton fn(res){console.log(res)}
        // let obj = {
        //     姓名:"张三"
        // }
        // console.log(obj.姓名);
        // let a = "a"
        // let aa 

    </script>
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